high low guessing game : https://learn-java-by-example.com/java/high-guessing-game/

vending machine simulator : http://www.oocities.org/therobfisher/vending.html

number baseball game : https://play.google.com/store/apps/details?id=com.game.numberbaseball

nim game : https://www.dotsphinx.com/games/nim/   /   http://www.gamedesign.jp/flash/nim/nim.html

life game : https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life


You would..